Preparation method of magnetic graphene-based aerogel with photocatalysis function

[0044] A preparation method of photocatalytic functional magnetic graphene-based airgel, comprising the following steps:

[0045] (1) Preparation of tetranitrophthalocyanine iron

[0046] Add 60mL of ethylene glycol, 6.02g of 4-nitrophthalonitrile, 2g of ferrous chloride and 6mL of 1,8-diazabicycloundec-7-ene into a 250mL three-necked flask; Condenser tube, nitrogen protection, reflux at 180 ° C for 3 hours; after the reaction is completed, filter while hot, wash with ethylene glycol, methanol, and acetone twice, wash with 2% hydrochloric acid until colorless, and then wash with deionized water until neutral, and finally washed with ethanol; cooled, grinded, and vacuum-dried at 90°C for 12 to 15 hours to obtain black powder tetranitrophthalocyanine iron.

[0047] (2) Preparation of tetraaminoiron phthalocyanine (FeTAPc)

[0048]Weigh 3.20g of the above iron tetranitrophthalocyanine powder and 12.4g of sodium sulfide into a 250mL flask, add about 70mL of N,N-dimethylformamide...

[0056] A kind of graphene oxide (γ-Fe 2 o 3 / rGO) preparation method, comprising the following steps:

[0057] (1) Preparation of graphene oxide-based airgel

[0058] Put 30mL of 98% concentrated sulfuric acid and place the beaker in an ice-water bath, then add 1g graphene and 0.5g anhydrous NaNO 3 , slowly add 3.0g of potassium permanganate under strong stirring, control the temperature below 20°C, stir for 3h, then place the beaker in a constant temperature water bath at 35°C (±3°C), continue stirring for 30min, and place the beaker in a 98°C In the oil bath, add deionized water continuously while stirring, pay attention to ensure that the temperature of the suspension does not exceed 100°C, keep stirring for 15 minutes, dilute the above suspension with 100mL deionized water, and then add an appropriate amount of 30% hydrogen peroxide to reduce the remaining permanganate Potassium and the generated manganese dioxide insoluble matter make them into colorless and soluble ma...